Predictive Vulnerability Intelligence.

Product

  • Product
  • Pricing
  • Documentation

Company

  • About
  • Partnerships
  • Blog
  • Support

Legal

  • Terms
  • Privacy
  • Data Licensing

© 2026 FAUCET Technologies LLC. All rights reserved.

CVE-2021-37501

24
FAUCET Score

CVE-2021-37501 is a buffer overflow vulnerability affecting HDFGroup hdf5 versions 1.12.0 through 1.13.0, specifically within the h5tools_str_sprint function. With a CVSS score of 7.5 (HIGH), this vulnerability allows unauthenticated attackers to cause a denial of service with low attack complexity. There is currently no evidence of active exploitation, publicly available exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
>= 1.12.0, <= 1.13.0CPE matchmatch criteria
cpe:2.3:a:hdfgroup:hdf5:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.54%
Probability of exploitation in next 30 days
EPSS Percentile
72.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0155 is in the 54th percentile among its peer group of 51,553 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (8)

microsoftpatch availablevia msrc
Product: Azure Linux 3.0 ARMFixed in: 1.12.1-13
microsoftpatch availablevia msrc
Product: 19088-17084Fixed in: 1.12.1-13
microsoftpatch availablevia msrc
Product: Azure Linux 3.0 x64Fixed in: 1.12.1-13
microsoftpatch availablevia msrc
Product: azl3 hdf5 1.12.1-13 on Azure Linux 3.0Fixed in: 1.12.1-13
microsoftpatch availablevia msrc
Product: CBL Mariner 2.0 x64Fixed in: 1.12.1-13
microsoftpatch availablevia msrc
Product: CBL Mariner 2.0 ARMFixed in: 1.12.1-13
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux AI 1.5 for RHEL 9.4Fixed in: hdf5-0:1.14.6-3.1.el9ai
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux AI 1.5 for RHEL 9.4Fixed in: libaec-0:1.1.3-1.el9ai
View patch

Vendor Advisories (3)

microsoft2024-Jun/CVE-2021-37501

CVE-2021-37501

Jun 11, 2024
redhatCVE-2021-37501Moderate

hdf5: heap buffer overread

Apr 27, 2023
microsoft2023-Feb/CVE-2021-37501Important

Buffer Overflow vulnerability in HDFGroup hdf5-h5dump 1.12.0 through 1.13.0 allows attackers to cause a denial of service via h5tools_str_sprint in /hdf5/tools/lib/h5tools_str.c.

Feb 14, 2023

References

github.com / HDFGroup/hdf5
ProductThird Party Advisory
github.com / HDFGroup/hdf5/issues/2458
github.com / ST4RF4LL/Something_Found/blob/main/HDF5_v1.13.0_h5dump_heap_overflow.md
ExploitThird Party Advisory